And He says, man-manā bhava mad-bhakto mad-yājī māṁ namaskuru (BG 18.65). This is the instruction. This is the substance of all instruction. Believe Kṛṣṇa, the Supreme Personality. Here is Kṛṣṇa. Believe that there is Kṛṣṇa. Innocent child will believe, but our brain is so dull, we will inquire, "Whether the Deity is made of stone or brass or wood," because we are not innocent. We are thinking that this Deity is something made of brass. Even it is brass, a brass is not God? Brass is also God. Because Kṛṣṇa says, bhūmir āpo 'nalo vāyuḥ khaṁ mano buddhir..., apareyam..., bhinnā me prakṛtir aṣṭadhā (BG 7.4). Everything is Kṛṣṇa. Without Kṛṣṇa there is no existence. So why Kṛṣṇa cannot appear as He likes? He can appear in brass. He can appear in stone. He can appear in wood. He can appear in jewel. He can appear in painting. Any way He can... That is all-powerful. But we have to take it that "Here is Kṛṣṇa." Don't take it that "Kṛṣṇa is separate from this Deity, and here we have got a brass form Deity." No. Advaitam acyutam anādim ananta-rūpam (Bs. 5.33). Advaita. He has multi-expansion, but they're all one.
So similarly, He is represented in His name. Abhinnatvān nāma-nāminoḥ (CC Madhya 17.133). When you are chanting the holy name of Kṛṣṇa don't think this is sound vibration and Kṛṣṇa is different. No. Abhinnatvān. Nāma-cintāmaṇi-kṛṣṇaḥ. As Kṛṣṇa is cintāmaṇi, similarly, His holy name is also cintāmaṇi. Nāma-cintāmaṇi-kṛṣṇaḥ caitanya-rasa-vigrahaḥ. Caitanya, full consciousness, nāma-cintāmaṇi-kṛṣṇaḥ. If we associate with name, that you must know, that Kṛṣṇa is fully conscious of your service. You are addressing, "He Kṛṣṇa! He Rādhārāṇī! Kindly engage me in Your service." Hare Kṛṣṇa mantra means, Hare Kṛṣṇa, "He Kṛṣṇa, he Rādhārāṇī, he energy, kindly engage me in your service." Ayi nanda-tanuja patitaṁ kiṅkaraṁ māṁ viṣame bhavāmbudhau. This is Caitanya Mahāprabhu's teaching. "O my Lord, Nanda-tanuja..." Kṛṣṇa becomes very glad when you associate His name, His activities, with some devotee. He's not impersonal. Kṛṣṇa has no name, but when He deals with His devotee, there is a name. Just like Kṛṣṇa dealing with Nanda Mahārāja, that Nanda Mahārāja's wooden slipper... Yaśodāmayī asked the child Kṛṣṇa You have seen the picture—"Can you bring the slipper of your father?" "Yes!" Immediately took on the head. You see? This is Kṛṣṇa. So Nanda Mahārāja became very pleased: "Oh, your son is very nice. He can bear such a load." So this is dealing.
Therefore Caitanya Mahāprabhu is addressing Kṛṣṇa, ayi nanda-tanuja. "O Kṛṣṇa, who is born out of the body of Nanda Mahārāja..." Just like the father is the body—giving person, seed, seed-giving father, similarly, Kṛṣṇa, although He is the origin of everything, but still, He is born by the seed of Nanda Mahārāja. This is Kṛṣṇa-līlā. Ayi nanda-tanuja patitaṁ kiṅkaraṁ māṁ viṣame bhavām-budhau. Caitanya Mahāprabhu never addressed Kṛṣṇa, "O the almighty." This is impersonal. He says, ayi nanda-tanuja, limited, "son of Nanda Mahārāja." Son of Nanda Mahārāja. So this is bhakti. He's unlimited. Just like Kuntīdevī was surprised that, when (s)he thought that Kṛṣṇa was afraid of Yaśodāmayī. That śloka you know. So he was, she was surprised that "Kṛṣṇa who is so exalted and great that everyone is afraid of Him, but He has become afraid of Yaśodāmayī."
So this can be enjoyed by the devotees, not the... Atheist class of men or non-devotees cannot understand. Therefore Kṛṣṇa said, bhaktyā mām abhijānāti (BG 18.55). Only the devotees, no others. Others, they have no admission in this kingdom, to understand. If you want to understand Kṛṣṇa it is only through bhakti. Neither knowledge nor yoga nor karma nor jñāna, nothing—nothing will help you. Simply a devotee. And how to become devotee? How easy it is? See here the Prahlāda Mahārāja, innocent child, simply offering his obeisances. And Kṛṣṇa is also asking you, man-manā bhava mad-bhakto mad-yājī māṁ namaskuru (BG 18.65). If you sincerely do these four items—always think of Kṛṣṇa... Hare Kṛṣṇa Hare Kṛṣṇa Kṛṣṇa Kṛṣṇa Hare Hare, (devotees chant) Hare Rāma Hare Rāma Rāma Rāma Hare Hare. So this is thinking of Kṛṣṇa, man-manā. And you can stick to this principle of Hare Kṛṣṇa mantra if you are unalloyed devotee. Without being unalloyed devotee it is very difficult. It will be tiresome. But we shall practice. Abhyāsa-yoga-yuktena (BG 8.8).
Immediately we cannot be first-class devotee. We cannot imitate Haridāsa Ṭhākura. That is not possible. But minimum. Saṅkhyā-pūrvaka-nāma-gāna-natibhiḥ. We have to practice. Certain numerical strength we must maintain. And we have made it, therefore... Some of our so-called devotees, they criticize me that I have limited only sixteen rounds. No, why sixteen rounds? You can make three hundred rounds, but minimum, minimum sixteen rounds, because we are not accustomed to devote much time. We must be busy always. But to sit down in one place and chant Hare Kṛṣṇa mantra continuously, that is not possible for any conditioned soul—unless he is liberated. So don't try to imitate. My Guru Mahārāja has strictly forbidden, "Don't try to imitate big personalities like Haridāsa Ṭhākura, Rūpa Gosvāmī." He used to say, rūpa gosvāmī ke mogha vāñchā (?). Rūpa Gosvāmī, because he used to put on a loin cloth... Tyaktvā tūrṇam aśeṣa-maṇḍala-pati-śreṇīṁ sadā tucchavat bhūtvā dīna-gaṇeśakau karuṇayā kaupīna-kanthā... So it is no use imitating Rūpa Gosvāmī, to imitate the dress, and then, as soon as there is opportunity, smoke bidi. (laughter) Don't do this nonsense. This is no use, imitation. Anusaraṇa, not anukāraṇa. Anukāraṇa is dangerous. Anusaraṇa. Sādhu-mārgānugamanam. This is bhakti. We shall try to follow the footsteps of big, big devotees, sādhus. We cannot... We shall try to follow. Don't try to imitate. That is very dangerous.